The best study guide for the net

Quick question, I'm scheduled to take the NET in a few weeks and would like to know the best study guide, I went to the library and the only guide they have is the 3rd edition of Barron's nursing school entrance exam,is this a good book to study? or should I buy the NET study guide at the book store? also are there science questions on the test? If someone has a good study guide I am willing to purchase it, I really want to do well on this test. If there is anyone out there that can help I would appreciate it... I live in arlington texas,and plan on attending concorde in arlington.

Thanks!!!